Lock-stitch sewing-machine.



Patented Apr. I, I902. M. MARX '& A. GUERRA.

LOCK STITCH szwms MACHINE.

(Application filed Oct. 18, 1901.) (No Model.)

6 Sheeis-Sheet I.

[1 6 imaged [n van/507%.- M @JM M m: uunms PEYERS no], morou'rnon wasumuron, n. c.

No; 696,578. Patented Apr. I, I902.

MuMAHX & GUERRA. LOCK STITCH SEWING MACHINE.

(Application filed Oct. 16, 1901.) (No Model. 6 Sheets-Sheet 2.

[4 6 22264465 [12 wen/Z01: M M M M X;

No. 696,578. Patented Apr. I, I902,

M. MARX &. A. GUERRA. LOCK STITCH SEWING MACHINE.

(Application filed Oct. 16. 1901) (No Model.) a sheets-sham 3.

1% bud/5&5: fiZIfGTC/Z OW SI No. 696,578. Patent ed Apr. I, I902.

m. MARX & A. GUE RHA.

LOCK STITCH SEWING MACHINE.

(Application filed Oct 16. 1901) ifi 27,644 f]? we] vim s Z5 WOZM WW MAJ We;

m: NORRIS Prr'ins cu, moroumq. wAsnmo'rcN, an

No. 696,578. Patented Apr. |902.

. M. MARX 8:. A. GUERRA.

LUCK STITCH SEWING MACHINE.

(Applirntion filed Octv 16. 19014 6 Sheets-$heet 5.

(No ModeL) [lawn/Ms THE "cams vmns ca, PHOTOLU'HO" WASHINGTON, b. c,

No. 696,578. Patented Apr. l. I902. M. MARX & A. GUERRA.

LOCK STITCH SEWING MACHINE.

(Application filvd Oct. 16, 1901.

(No Model;-

6 Sheets-Sheet 6.

m: nonms PETERS ca :mcruuma, wummrow. n c

ilivrrnio Smarts Parent @rrrcn.

MICHAEL MARX, OF NEW YORK, N. Y., AND ASTEBlO GUERRA, OF

PHILADELPHIA, PENNSYLVANIA.

4N part of Letters Eaten; No. 696,578, dated April 1, 1902.

Application filed October 16, 1901 Serial No. 78,794. (No model.)

To all wit/mt it 777/(b 7/ C072/C07Ib:

Beit known that we, MICHAEL MAnX,a resident of New York, State of New York, and ASTERIO GUERRA, a resident of Philadelphia, Pennsylvania, citizens of the United States, have invented certain new and useful Improvemen ts in Outsole Lock-Stitch Machines, of which the following is a specification.

This invention relates to an outsole lockstitch machine in which a bobbin and a shuttle are entirely dispensed with, the thread being delivered directly from the original spool, which is bodily placed into the machine. Numerous advantages result from this construction. The machine can run very much longer without receiving a new thread,poorlywound bobbins are abolished, and the use of a bobbin-winder is entirely dispensed with. Further, the thread is not waxed previous to being wound upon the bobbin, but on its passage from the spool to the work, so that a superior playing out of the thread and a coating of superior uniformity is obtained.

In the accompanying drawings, Figure 1 is a front elevation of our improved outsole lockstitch machine; Fig. 2, a rear elevation; Fig. 8, an end elevation; Fig. 4, a detail side view of the spool-holder; Fig. 5, a front view, and Fig. 6 a top view thereof; Fig. 7, a detail face View of the thread-guide; Fig, 8, an end view thereof; Fig. 9, a cross-section 011 line 9 9, Fig. 7; Fig. 10, a front view of the shell that incloses the spool-holder; Fig. 11, a section on line 11 11, Fig. 10; Fig. 12, a top view of the spool-holder and shell; Fig. 13, a front view of the spool-holder and coacting mechanism. Fig. 14 is a detail front view showing the position of the needle-thread when engaged by the thread-carrier; Fig. 15, a side view thereof; Fig. 16, a detail front view similar to Fig. 14E,showing a subsequent position of the parts; and Fig. 17, a detail of the stitch formed by the machine.

The letter (1, represents the frame of the machine. his the slotted work-table; c, the pressure-foot having handle 0. d is the looper, and e the awl. f is the thread-lifter, and g the needle, having hook g for drawing the thread through the work. Below the worktable is arranged the take-up 7b, thread-lock 7L, and take-up lever All these parts are of the construction well known in this class of machines and do not form part of the present invention. The throwof the take-up lever 1', however, is greater than heretofore, because it has to close a loop much larger than that formed in the old class of machines. The lever t' receives its motion from workshaftj, through cam j, cam-leverj connectionj, and crank-shaftj, upon which the lever t' is mounted.

\Ve propose to dispense entirely with the bobbin, shuttle, and shuttlemotion, and to lay the thread from an ordinary spool into the loop of the needle-thread by giving to the latter a motion in addition to that which it'has heretofore received. To effect this result, the loop formed by the needle-thread is drawn out by a thread-carrier,which largely increases its size and lays it around the spool of the spoolthread, so that in this way a lock -stitch is formed. Thethrezul-carrierconsistsofalever 7c, having a hook 7t" and receiving oscillating and vertically-reciprocating movement, so that the hook 7t" revolves around the spool, as indicated by arrow 1 and the dotted line 1, Fig. 13. In its lowermost position the hook it is adapted to engage the loop of the needle-thread A when the latter has been drawn out by the needle 9 and thread-lifter f, Figs. 14: and 15. The lever 7r then commences to ascend, so as to take the loop off the needle and thread-lifter and to greatly increase its size. The enlarged loop is then laid around the spool, is disengaged from the hook 7c, and is finally closed'by the take-up levert' to form the lock-stitch.

The means for imparting simultaneously reciprocating and oscillating motion to the lever 7c are as follows: To a slide on, Fig. 1, movable between rails in, is pivoted at 70 the upper end of lever 7c. The slide receives vertical reciprocating motion from a cam m on shaftj through cam-lever m and connection m A guide 7& holds the lever 70 in a plane parallel to the slide. Between the fulcrum 71: and the hook 7t" the lever 7; is pivotally connected to one end of an arm n, the other end of which is pivoted to a slide a, to which horizontal reciprocating movement is imparted from a cam 07. through cam-levern. It

will be seen that by the joint movements of ICO .the spool-thread B is loosely mounted.

the slides m and n a combined vertical reciprocating and oscillatingmotion is impartedto the lever 76.

As has been before stated, the bobbin, sh uttle, and shuttle-motion are dispensed with in our machine, and in lieu of a bobbin and bobbin-thread we place into the machine an ordinary spool and spool-thread, so that any rewinding of the thread from the original spool upon the bobbin is obviated.

The spool is placed into aspool-holder provided with a wax-pot, through which the thread is drawn. The spool-holder and waxpot are arranged Within a slotted shell, between which and the spool-holder the loop is carried by the thread-carrier 70. Thus after the loop has cleared the spool-holder and Waxpot the Waxed spool-thread B will be laid into the loop of the needle-thread A, and by closing the latter the lock-stitch desired will be formed without imparting any shuttlemotion to the thread B.

The shell 0 for holding the spool-holder, Figs. 10 to 13, is of cylindrical form, with an open bottom, flanged, as at 0',.and with a slotted side 0 facing-the needle. The shell 0 is rigidly attached in an inclined position to an arm a of frame a and is heated by a steam or gas pipe 0 Near its upper end it is provided with a pair of curved converging thread-guides 0 at opposite sides of its slots 0 A free space or gap is formed between the slide m and shell 0, within which the lever 7.0 moves, so as to allow the hook to describe the curve Z around the shell. The spoolholder 19 is also composed of a cylindrical shell, which is adapted to be supported upon flange 0 and is of a diameter smaller than the shell 0, so that the loop can he slipped around the spool holder within the shell. The spool-holder 1) has a false bottom 13, carrying spindle p upon which the spool B of The lower chamber formed in the spool-holder is adapted to receive a wax-pot p held thereto bya bayonet-joint or otherwise. The thread B passes from the spool B first through a perforated yoke p and is thence conducted into and out of the wax-pot by means of the threadguide illustrated in Figs. '7 to 9. This threadguide is composed of an inclined plate 10", from which projects downwardly an arm 19, having a slotted lower edge. At one side of this arm is secured to the plate 19 a tensionsprlng p and at the other side is secured a wax-stripper 11 and a thread-duct p.

F ro m the bottom of the wax-pot 19 project the eyes 12 The thread passes from yoke p through a slot 19, under spring 19, around arm 19, through stripper 19 through duct 19", out of perforation p and thence down along the outer side of the spool-holder through the eyes 19 and to the work.

The operation, briefly described, is as follows: The sole D and welt E are placed upon the work-table b, and the presser-foot c is lowered. The awl e rises through the slotted table to perforate the leather and moves to the left to a position underneath the needle 9, by which motion the Work is advanced for the distance of one stitch. The awl returns or descends, and the needle simultaneously descends through the perforation just made. The looper d moves to the right to lay the thread A into the hook g of the needle. The needle ascends to form a loop, draw it through the work, and place it upon the thread-lifterf. The thread-lifter rises to somewhat lengthen the loop, which is then engaged by the hook 7a of the lever 7r, Figs. 14 and 15. The lever 7c rises to take the loop off the needle and thread-lifter and place it around the top of the spool-holder, Fig. 13, the take-up lever 01 rising simultaneously. After the loop has been slipped over the spool-holder it leaves the hook 7c and is drawn down by the takeup lever 2', Fig. 16, which thus closes the loop upon the spool-thread and forms the lockstitch shown in Fig. 17.

What we claim is 1. In an outsole lock-stitch machine, the combination of a spool-holder with a hooked needle, 2. thread-lifter, a thread-carrier, a take-up lever, and with a pair of slides, to both of which the thread-carrier is connected, substantially as specified.

2. In an outsole lock-stitch machine, the combination of a spool-holder with a wax-pot, means for conducting the spool-thread from the spool-holder first into and then out of the wax-pot, means for looping a needle-thread, and means for passing the looped needlethread around the spool-holder and wax-pot, substantially as specified.

Signed by us at New York city, New York, this 15th day of October, 1901.

MICHAEL MARX. ASTERIO GUERRA.

IVitnesses:

F. v. BRIEsE-N, EDWARD RAY. 

